Unblock blocked-attachment in MS Outlook

1. Exit Outlook if it is running.
2. Start Regedit
3. Go to HKEY_CURRENT_USER\Software\Microsoft\Office\11\Outlook\Security
4. Create a new string value called Level1Remove
5. Enter in the file extensions you want to use, such as .exe or .bat
6. You can have multiple file types separated by a semicolon
7. .exe;.com